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Improving Mindat.orgTr-State photos that don't belong

19th Aug 2018 05:25 UTCDana Slaughter ๐ŸŒŸ Expert

The following is a list of photos that I don't believe belong in the Tri-State locality page:


https://www.mindat.org/photo-90525.html

Almost certainly Berry Materials quarry, North Vernon, Jennings Co. IN


https://www.mindat.org/photo-90525.html

Ditto, though less certain


https://www.mindat.org/photo-460922.html

Sweetwater mine, Ellington, Reynolds Co., MO


https://www.mindat.org/photo-4564.html

Likely Shangbao mine, Hunan, China


https://www.mindat.org/photo-4117.html

Never seen anything like it from Tri-State--looks like CO or Peru


https://www.mindat.org/photo-66627.html

Viburnum Trend...see micro dolomite xls


https://www.mindat.org/photo-354800.html

Viburnum Trend, MO---see dolomite xls


https://www.mindat.org/photo-610074.html

Likely Elmwood district, TN


https://www.mindat.org/photo-713819.html

Brushy Creek mine, Greeley, MO


There are a couple others that I consider doubtful but am not confident

due to photo quality, personal wavering, etc.


Thanks!

19th Aug 2018 06:51 UTCBob Harman

DANA, et al:

I basically agree. After review:

the first 2 examples 90525 are identical, one and the same specimen, from Berry Materials in North Vernon, In

460922 agree

4564 could well be from Missouri, n.o.s., several localities. China??????

66627 agree

354800 octahedral galena associated with micro dolomites and micro chalcopyrite. West Fork Mine, Viburnum Trend District, Reynolds Co, Missouri

610074 ?

713819 agree


CHEERS............BOB

19th Aug 2018 14:42 UTCKevin Conroy Manager

Dana's right, none of these are from the Tri-State District.


4117 looks like some that I've seen from Park City District, Utah.

19th Aug 2018 21:26 UTCDana Slaughter ๐ŸŒŸ Expert

Hi Bob,


4654 is a dead ringer for the Shangbao dolomite associated with tiny quartz crystals as mentioned in the description. These were available wholesale through Top Gem Minerals, Inc. and Collectors Edge Wholesale at Tucson several years ago. I had some of these and I would bet a house payment that it is from Shangbao---the backside is likely covered with tiny quartz crystals.

20th Aug 2018 00:20 UTCKelly Nash ๐ŸŒŸ Expert

I agree with the others, but don't share your certitude on 4564 myself. Maybe Shangbao, maybe not, to me. FYI, there are a couple different pictures of the specimen, including the other side, on the John Betts Mineral Museum website, here: Dolomite with Quartz, but I'm not sure they prove anything. What I would like to see is whether the point of attachment shows the matrix is chert. That would indicate Tri-State. Is it the white coloration of the dolomite that is bothersome? The quartz?

20th Aug 2018 00:46 UTCKeith Compton ๐ŸŒŸ Manager

I'd be very surprised if John got this so wrong with (4564) - given that he says it is from his personal collection. Shoudl be able to check the base of the specimen - but that now depends on who now holds the specimen.

20th Aug 2018 02:11 UTCDana Slaughter ๐ŸŒŸ Expert

Hi Kelly,


The coloration and morphology of the dolomite (and size of xls) along with the associated quartz make me very suspicious of a Tri-State origin. I've had virtually identical specimens from Shangbao and was reluctant to include the specimen because of my respect for the poster---a very educated individual. He might be able to shed light as to when the specimen was added to his collection---if pre-2000 then Shangbao could likely be ruled out.


Kevin chimed in agreement and I certainly respect his Tri-State expertise as well as yours.

20th Aug 2018 03:12 UTCKelly Nash ๐ŸŒŸ Expert

Well, I know that Kevin is way beyond me in his knowledge of Missouri minerals.

20th Aug 2018 03:12 UTCAlfredo Petrov Manager

Keith wrote: "Should be able to check the base of the specimen - but that now depends on who now holds the specimen."


I have a bit of an off-topic comment to make here, but I wish every mineral photo on Mindat would include a daughter photo of the matrix or base. That would often make it much easier to tell whether the provenance is correct. (And I'm a hypocrite because, no, I haven't done this either.)

20th Aug 2018 04:01 UTCKevin Conroy Manager

Quartz was relatively uncommon in the Tri-State District. In my opinion the mines near Baxter Springs, Kansas produced the best specimens, especially the Swalley Mine and Ballard Mine. The quartz was always on chert matrix. It formed as a druse coating, sometimes with sphalerite, galena, chalcopyrite, marcasite and/or selenite. I hadn't even thought about it until this post, but I don't recall ever seeing a Tri-State dolomite/quartz combo specimen! This doesn't mean they don't exist, just that I'm unfamiliar with any.

20th Aug 2018 04:14 UTCPaul Brandes ๐ŸŒŸ Manager

Alfredo Petrov Wrote:

-------------------------------------------------------

> I have a bit of an off-topic comment to make here,

> but I wish every mineral photo on Mindat would

> include a daughter photo of the matrix or base.

> That would often make it much easier to tell

> whether the provenance is correct. (And I'm a

> hypocrite because, no, I haven't done this

> either.)


Preach on, brother! :-)

And yes, I'm guilty of not doing this either...

20th Aug 2018 05:43 UTCKeith Compton ๐ŸŒŸ Manager

There is another photo of Dolomite with Quartz from Tri-State that also shows a little chert/dolostone like matrix

https://www.mindat.org/photo-441281.html

20th Aug 2018 14:29 UTCKevin Conroy Manager

Keith, unfortunately the dolomite with quartz is another specimen that's not from the Tri-State District. This one is from Williamsville Quarry in Butler County, Missouri. Please see this calcite specimen. The druse quartz from here has more of a brown hue, whereas the quartz from the Tri-State District is either blackish to gray, or white.

22nd Aug 2018 03:25 UTCJohn Betts

Keith Compton Wrote:

-------------------------------------------------------

> I'd be very surprised if John got this so wrong

> with (4564) - given that he says it is from his

> personal collection. Shoudl be able to check the

> base of the specimen - but that now depends on who

> now holds the specimen.



It was acquired from Robert Bates, who who had access and collected extensively at the Mid-Continent Mine, then used that material to trade with others worldwide. But it is possible that labels got switched...

22nd Aug 2018 04:05 UTCDana Slaughter ๐ŸŒŸ Expert

I just noticed that I referenced the same specimen twice in my original posting---oops. I can't seem to find the other calcite that I intended to point out. In any case, these are also not Tri-State specimens. I firmly believe that my original posting entries should all be removed from the Tri-State district along with the following.


https://www.mindat.org/photo-157530.html


https://www.mindat.org/photo-694235.html


https://www.mindat.org/photo-769899.html


I'm very confident that the Betts dolomite is Chinese and almost certainly from the Shangbao mine---at the very least it should be removed from the district. No action has been taken on these photos so I thought to refresh.

22nd Aug 2018 13:21 UTCKevin Conroy Manager

I agree that these three aren't from the Tri-State District. The first could be from a number of places, the other two are from the southern end of the Viburnum Trend (most likely from either Sweetwater or Fletcher Mine).

2nd Sep 2018 16:24 UTCDana Slaughter ๐ŸŒŸ Expert

Has anything been done on these photos? Just wanted to refresh so that these can be removed from the Tri-State locality page.

10th Sep 2018 05:36 UTCDana Slaughter ๐ŸŒŸ Expert

It has been a while and I've noticed that these photos wrongly remain on the Tri-State district pages---can anyone fix?

11th Oct 2018 18:13 UTCKevin Conroy Manager

I just saw another specimen that fits this category: https://www.mindat.org/photo-61665.html


The white rhombic dolomite crystals are the indicator that this is from the Viburnum Trend in Missouri.

17th Oct 2018 15:33 UTCDana Slaughter ๐ŸŒŸ Expert

Agree completely---signature Trend dolomite.
 
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